Tone controller



FIG. 1 is a perspective view of a tone controller of my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a side view thereof taken from the left side;

FIG. 7 is a side view thereof taken from the right side; and,

FIG. 8 is a perspective view thereof showing that the article according to the design is in conducting state. 

The ornamental design for a tone controller, as shown and described. 